#!/bin/bash

echo "zhangjie hanhong zhoujielun zhoubichang xiaohudui xusong" >singer.txt
singer=(`cat singer.txt`)
for i in `seq 20`
do
	a=$[RANDOM%6]
	if [[ ${singer[$a]} != '' ]]
	then
		echo ${singer[$a]}
		unset singer[$a]
	fi
done
